Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b14f5d482231a7…

MALICIOUS

PDF

42.5 KB Created: 2020-09-04 23:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1400c51dd8f73243f0a10975055e6651 SHA-1: df7fbd8477614726ee51472ddd154046629aac16 SHA-256: 10b14f5d482231a75fcd08bdb24ac85931a3d99ccd5c71ebd2f0981be6af7add
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/pify?keyword=facebook+lite+modified+apk', is designed to trick users into downloading a modified APK, likely leading to malware. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting a broader campaign for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/pify?keyword=facebook+lite+modified+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_64d4c30f99834af4941a77d1891491d8.pdf
    • https://static.usrfiles.com/ugd/cf79db_9542c5c21dcd4e9cb3996516dda23c2b.pdf
    • https://static.usrfiles.com/ugd/3de8a6_88e8ef0f17414f3d86212250b3582a8d.pdf
    • https://static.usrfiles.com/ugd/8d57bd_6044ae77885e4139972869afabe4e072.pdf
    • https://static.usrfiles.com/ugd/0aab01_cc9cab448f1341c2b76ee82ea727a033.pdf
    • https://static.usrfiles.com/ugd/822ecd_a2eac732f02042f4bb007d4288757caa.pdf
    • https://static.usrfiles.com/ugd/cc14e4_423abda8e1aa49c5a4fd01474095a656.pdf
    • https://static.usrfiles.com/ugd/f96b02_87d526afa0db4610b570e147d7d91588.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d878a99e694a5d98a201f02f8bfb7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5100807d3b64777b106570bcd38f556.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_4970defc9cfd4ff0ad43b6e4d47ac68d.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/67715772329.pdf
    • https://cdn.shopify.com/s/files/1/0460/0555/1271/files/32450088005.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5353/files/watawasiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/48844383709.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066e3.bin
b29d86b2e65440339516814d936b420b98d3f898c5c53ea011387ec0be38b64c
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E3 5184 bytes
font_01_sfnt_off0000787d.bin
aad9f211c0f84168f24d92c3138a18ba0479bf8a1f470c71c30f5bfa30743528
pdf-font-stream PDF embedded font (sfnt) at offset 0x787D 10648 bytes